Alipta got some amount of money from her father. In how many years will the ratio of the money and the interest obtained from it be 10 : 3 at 6% simple interest per annum ?

Solution (By Examveda Team)

$$\eqalign{ & {\text{Let principal and SI is}} \cr & {\text{ = }}10x,{\text{ }}3x{\text{ }} \cr & {\text{and time is = }}t \cr & \Rightarrow 3x = \frac{{10x \times 6 \times t}}{{100}} \cr & \Rightarrow t = 5\,{\text{years}} \cr} $$